* Creates and initializes a new {@link ConfigurableEngine}.
*
* @return Returns the created {@link ConfigurableEngine}.
*/
private void setUpJavaScriptEngine() {
engine = new ConfigurableEngine(this.runner.getClient());
engine.registerClass(Global.class);
engine.registerClass(Shell.class);
Shell.setResolver("lib", new LibraryResolver("/org/moyrax/javascript/lib"));